Point source

A point source may be

• a source of light that is treated as having no physical extension, or
• a source in fluid flow, or in electrostatics, or
• a source of pollution coming from a single cause, such as a municipal plant.
• a stone thrown into water generating waves

In general the energy of other emission of a point source will radiate in a circle (in water) or as a sphere.

See also: Point source, Electrostatics, Fluid flow, Light, Pollution, Municipal plant